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Stressed out, Part I. A study that surveyed a random sample of otherwise healthy high school students found that they are more likely to get muscle cramps when they are stressed. The study also noted that students drink more coffee and sleep less when they are stressed.
(a) What type of study is this?
(b) Can this study be used to conclude a causal relationship between increased stress and muscle cramps?
(c) State possible confounding variables that might explain the observed relationship between increased stress and muscle cramps.
Calculate Statistical Significant Difference of Voting
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Construct a distribution to represent the population such that the survey result above may be seen as a sample from the population.
assume the 67 of the cars on a particular freeway are traveling faster than 70 miles per hour. a random sample of 15
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